(2) And {Bowles, S.\u00c2\u00a0 (2009), Science,<\/em> 324<\/strong>, p. 1293-1298} argues that it was mortality due to inter-group rivalry that gave rise to your\u00c2\u00a0 much-touted\u00c2\u00a0 costly individual altruism. Particularly interesting is his analysis of Pleistocene mortality rates resulting from inter-group conflict:<\/p>\n Well, humans, hasn’t it been an interesting week in the modelling of your behaviour? (1) To start off, {Powell et al. (2009), Science, 324, p. 1298-1301} convincingly argue that it was population density, not genetic change, that got the ball rolling on your symbolic and technological complexity in the Late Pleistocene: (z measures “level of … Continue reading Altruism, Inter-group conflict, Demography<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-922","post","type-post","status-publish","format-standard","hentry","category-humans"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/posts\/922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/comments?post=922"}],"version-history":[{"count":20,"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/posts\/922\/revisions"}],"predecessor-version":[{"id":1107,"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/posts\/922\/revisions\/1107"}],"wp:attachment":[{"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/media?parent=922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/categories?post=922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.realfuture.org\/wordpress\/wp-json\/wp\/v2\/tags?post=922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"skillaccumulationdemography1\"](\"http:\/\/www.realfuture.org\/wordpress\/wp-content\/uploads\/2009\/06\/skillaccumulationdemography1.jpeg\" "\\"skillaccumulationdemography1\\"")
<\/a>An illustration, from a single iteration and shown at 25-generation intervals, of the spatial structuring of skill accumulation in a heterogeneous subpopulation density world. The left side of each subplot is populated at density Dhigh (0.02) and the right side at density Dlow (0.002). Each subpopulation is marked by a circle, centered on the spatial location of the group and with diameter proportional to its mean z value. Regional mean z values are also given at the top of each subplot.<\/p>\n\n
<\/a>Sources of archaeological (filled squares) and ethnographic (filled dots) evidence on warfare and genetic (open dots) data on between-group differences.<\/dt>\n<\/dl>\n<\/a>Summary statistics: Fraction of total mortality due to warfare.<\/p>\n","protected":false},"excerpt":{"rendered":"